Instruction manual

FEATURES AND SERVICES
Data Dial Codes (DDCs)
At the time of installation each digital data endpoint will be assigned a Data Dial Code (DDC)
that serves as its extension number. A maximum of 104 DDCs may be allocated in a system.
Direct Inward Dial (DID) Number Assignments
Each DID number is associated with a unique PDC (floating or assigned), a DGC access
code, a Remote Access point, a DDC, or a pooled facility access code. The code associated
with a DID number is the last 2, 3, or 4 digits of the DID number. For example, the code
associated with the DID number “NXX-2157” will be 57, 157, or 2157.
All dial codes in the system that are associated with DID numbers should have the same
number of digits.
However, there is no requirement that all PDCs, DDCs, DGC access
codes, or facility access codes be associated with DID numbers.
Voice Terminal Directed Features
Directed Night Service, DGC calls, Personal Line Calls, Manual Signaling, Station Message
Waiting, Automatic Intercom,
and Outward/Toll Restriction are associated with specific
terminals (stations), not with PDCs. This means that these features do not move with a PDC
when it is signed in at another voice terminal.
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